--- src/java/org/apache/poi/ss/formula/functions/MathX.java	(revision 1134872)
+++ src/java/org/apache/poi/ss/formula/functions/MathX.java	(working copy)
@@ -53,13 +53,7 @@ 
             retval = Double.NaN;
         }
         else {
-            if (p != 0) {
-                double temp = Math.pow(10, p);
-                retval = Math.round(n*temp)/temp;
-            }
-            else {
-                retval = Math.round(n);
-            }
+            retval = java.math.BigDecimal.valueOf(n).setScale(p, java.math.RoundingMode.HALF_UP).doubleValue();
         }
 
         return retval;
@@ -87,22 +81,7 @@ 
             retval = Double.NaN;
         }
         else {
-            if (p != 0) {
-                double temp = Math.pow(10, p);
-                double nat = Math.abs(n*temp);
-
-                retval = sign(n) *
-                    ((nat == (long) nat)
-                            ? nat / temp
-                            : Math.round(nat + 0.5) / temp);
-            }
-            else {
-                double na = Math.abs(n);
-                retval = sign(n) *
-                    ((na == (long) na)
-                        ? na
-                        : (long) na + 1);
-            }
+            retval = java.math.BigDecimal.valueOf(n).setScale(p, java.math.RoundingMode.UP).doubleValue();
         }
 
         return retval;
@@ -130,13 +109,7 @@ 
             retval = Double.NaN;
         }
         else {
-            if (p != 0) {
-                double temp = Math.pow(10, p);
-                retval = sign(n) * Math.round((Math.abs(n)*temp) - 0.5)/temp;
-            }
-            else {
-                retval = (long) n;
-            }
+            retval = java.math.BigDecimal.valueOf(n).setScale(p, java.math.RoundingMode.DOWN).doubleValue();
         }
 
         return retval;
--- src/testcases/org/apache/poi/ss/formula/functions/TestMathX.java	(revision 1134872)
+++ src/testcases/org/apache/poi/ss/formula/functions/TestMathX.java	(working copy)
@@ -672,6 +672,9 @@ 
         
         d = 150.0; p = -2;
         assertEquals("round ", 200, MathX.round(d, p));
+
+        d = 2162.615d; p = 2;
+        assertEquals("round ", 2162.62d, MathX.round(d, p));
     }
 
     public void testRoundDown() {